Title:
PRESSURE-RESISTANT SEALING RING FOR TROCAR AND TROCAR SHEATH AND TROCAR
Document Type and Number:
WIPO Patent Application WO/2022/048503
Kind Code:
A1
Abstract:
The pressure-resistant sealing ring of the present invention comprises a cut-out, a support surface, an end sealing surface and a reset mechanism. A central part of the support surface is provided with the cut-out, and an edge of the support surface is connected to the end sealing surface. The reset mechanism is disposed on an outer side of a support slope, the reset mechanism usually achieves the reset support of the support slope by mutually cooperating positioning edges that have a certain height. The mutually cooperating positioning edges have cooperating surfaces that can cooperate with one another. When an instrument is removed, the cut-out is closed and the positioning edges are restored to an initial position. The cooperating surfaces are close to one another to form a surface contact to prevent displacement along the height direction. Under the action of static pressure in the abdomen, the cooperating surfaces fittedly support one another, and under the action of enhanced support of the positioning edges, the cut-out is not likely to be displaced, thereby better ensuring the sealing property of the pressure-resistant sealing ring under high static pressure. The trocar of the present invention containing the pressure-resistant sealing ring of the present invention therefore also has a good and stable sealing performance under high static pressure.
Inventors:
ZHOU XING (CN)
Application Number:
PCT/CN2021/115067
Publication Date:
March 10, 2022
Filing Date:
August 27, 2021
Export Citation:
Assignee:
ZHOU XING (CN)
International Classes:
F16K15/14; A61B17/34
Foreign References:
| CN213489179U | 2021-06-22 | |||
| US20090234290A1 | 2009-09-17 | |||
| US20140276464A1 | 2014-09-18 | |||
| EP1350476A1 | 2003-10-08 | |||
| CN105105842A | 2015-12-02 | |||
| US20140074035A1 | 2014-03-13 |
Download PDF: